Safe and optimized fuel-rich burner of boiler based on water-cooled wall hydrodynamic force
By setting up a swirl structure in the fire-breathing pipe and installing a burner evenly at the bottom of the boiler, the problem of insufficient fuel and air mixing is solved, more efficient combustion and more uniform heat distribution are achieved, the corrosion risk of water-cooled walls is reduced, and the safety and stability of the boiler is improved.
Patent Information
- Application Number
- CN202422421106.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-08
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-10-08
AI Technical Summary
The low degree of fuel and air mixing in fuel-rich burners leads to insufficient combustion, reducing combustion efficiency and increasing incomplete combustion products, and increasing the risk of chemical corrosion of water-cooled walls.
A swirl structure is arranged in the flame-breathing pipe, including a swirl tube and a swirl sheet, to promote the rotational movement of fuel and air before combustion, and to evenly install multiple sets of burners at the bottom of the boiler body to adjust the combustion angle to form a uniform flame distribution.
Improve combustion efficiency, reduce incomplete combustion products, reduce the risk of chemical corrosion of water-cooled walls, ensure uniform heat distribution in the boiler, and improve the safety and mass flow rate of water-cooled walls.
Smart Images
Figure CN223063839U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of burners, in particular to a rich fuel burner for optimizing the water dynamics safety of a boiler based on a water-cooled wall. Background Technique
[0002] A rich fuel burner is a commonly used combustion device in a boiler, and its working principle is as follows: A rich fuel burner usually uses solid, liquid or gaseous fuel; the fuel is transported to the burner through a pipeline or a nozzle; for solid fuel, such as pulverized coal, the coal is usually ground into fine powder by a coal mill and then carried into the burner by primary air; for liquid fuel, such as heavy oil or diesel, the fuel is pressurized by an oil pump and sprayed into the burner through a nozzle; for gaseous fuel, such as natural gas, it is directly transported to the burner through a pipeline; combustion requires sufficient air; a rich fuel burner is usually equipped with a secondary air system to provide the oxygen required for combustion; the primary air is mainly used to transport the fuel and mix with the fuel at the initial stage of combustion to form a rich fuel combustible mixture; the secondary air is gradually added during the combustion process to ensure complete combustion of the fuel.
[0003] When the flame spraying pipeline of the rich fuel burner is spraying and burning, the fuel and air cannot make full contact inside the flame spraying pipeline, the mixing degree is low, the combustion is incomplete, the combustion efficiency is reduced, and the generation of incomplete combustion products is increased. Content of the Utility Model
[0004] The purpose of the utility model is to provide a rich fuel burner for optimizing the water dynamics safety of a boiler based on a water-cooled wall to solve the defects mentioned in the above background technique.
[0005] To achieve the above purpose, a rich fuel burner for optimizing the water dynamics safety of a boiler based on a water-cooled wall is provided, which includes a rich fuel burner body. A positioning disk is fixedly installed at the end of the rich fuel burner body, and a flame spraying pipeline is fixedly arranged on the surface of the positioning disk. Meanwhile, the flame spraying pipeline is inserted into the lower side inside the boiler body, and four groups of boiler bodies are evenly installed on the circumferential side wall at the bottom of the boiler body, and the distance between adjacent two groups of boiler bodies is the same. A swirl structure and its installation components are installed inside the flame spraying pipeline. The swirl structure and its installation components include a swirl tube inserted into the flame spraying pipeline, and swirl vanes are fixedly arranged on the circumferential inner wall of the swirl tube.
[0006] Preferably, the axial section of the swirl tube and the flame spraying pipeline is a concentric circle structure, and the swirl tube is a cylindrical structure made of metal material.
[0007] Preferably, the thickness of the swirl tube is less than the thickness of the flame spraying pipeline, and the swirl vanes inside the swirl tube are spiral structures made of metal material.
[0008] Preferably, three positioning seats are evenly installed on the circumferential outer wall of the cyclone tube, and the distance between adjacent two groups of positioning seats is the same. Three positioning grooves are evenly opened on the circumferential inner wall of the flame spraying pipe, and the distance between adjacent two groups of positioning grooves is the same.
[0009] Preferably, the sizes of the positioning seat and the positioning groove are adapted to each other, and the three positioning seats are respectively inserted into the three positioning grooves. The cross sections of the positioning seat and the positioning groove are both in the shape of a dovetail.
[0010] Preferably, two screw holes are evenly opened on the surface of the positioning seat, and three reinforcing seats are evenly arranged on the circumferential outer wall of the flame spraying pipe. At the same time, the three reinforcing seats are respectively arranged opposite to the three positioning grooves. The positioning seat is inserted into the positioning groove and fixedly connected by two fixing bolts. The fixing bolts pass through the through holes opened on the reinforcing seat and are screwed and fixed inside the screw holes opened on the surface of the positioning seat.
[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0012] 1. By arranging swirl vanes on the inner wall of the cyclone tube in the present utility model, the swirl vanes are spiral structures made of metal materials. Under the guiding action of the swirl vanes, fuel and air generate rotational motion before combustion and ejection; the mixing degree of fuel and air is enhanced, combustion is made more sufficient, the combustion efficiency is improved, incomplete combustion products are reduced, and the risk of chemical corrosion to the water-cooled wall is lowered; the rotating fuel and air can form a stable flame shape, so that heat is more evenly distributed in the furnace, and the possibility of local overheating of the water-cooled wall is reduced;
[0013] 2. By evenly installing four groups of the boiler body on the circumferential side wall at the bottom of the boiler body in the present utility model, since the combustion intensity of the burner directly affects the heat load distribution in the furnace; by reasonably adjusting the combustion angle of the burner, the heat distribution in the furnace can be made more uniform, thereby reducing the risk of local overheating of the water-cooled wall; for the burners arranged at the four corners, by adjusting the air-coal ratio and combustion angle of each corner burner, the flame center position can be made appropriate, avoiding the flame being too close to the water-cooled wall, resulting in too high local heat load; ensuring the hydrodynamic safety of the water-cooled wall on the boiler side. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a front view schematic diagram of the structure of the present utility model;
[0015] Figure 2 It is a schematic diagram of the structure of the flame spraying pipe;
[0016] Figure 3 It is a schematic diagram of the sectional structure of the cyclone tube;
[0017] Figure 4 It is a schematic diagram of the uniform installation of three groups of rich fuel burner bodies at the bottom of the boiler body.
[0018] Reference numerals in the figure: 1, rich fuel burner body; 2, positioning disc; 3, flame spraying pipeline; 4, swirl structure and its installation components; 41, swirl tube; 42, swirl vane; 43, positioning seat; 431, screw connection hole; 44, positioning groove; 45, strengthening seat; 451, perforation; 5, boiler body. Specific implementation manner
[0019] Please refer to Figures 1-4 , the present utility model provides a rich fuel burner for optimizing the hydrodynamic safety of a boiler based on a water wall, comprising a rich fuel burner body 1, a positioning disc 2 is fixedly installed at the end of the rich fuel burner body 1, and a flame spraying pipeline 3 is fixedly arranged on the surface of the positioning disc 2. Meanwhile, the flame spraying pipeline 3 is inserted into the lower side inside the boiler body 5, and four groups of the boiler body 5 are evenly installed on the circumferential side wall of the bottom of the boiler body 5, and the distance between adjacent two groups of the boiler body 5 is the same. A swirl structure and its installation components 4 are installed inside the flame spraying pipeline 3. The swirl structure and its installation components 4 include a swirl tube 41 inserted into the flame spraying pipeline 3, and swirl vanes 42 are fixedly arranged on the circumferential inner wall of the swirl tube 41.
[0020] Working principle: When in use, when fuel and air are mixed and burned inside the fire-spraying pipe 3, the fuel and air shuttle inside the fire-spraying pipe 3. A swirl tube 41 is fixedly installed inside the fire-spraying pipe 3. At the same time, swirl vanes 42 are arranged on the inner wall of the swirl tube 41. The swirl vanes 42 are spiral structures made of metal. Under the guiding action of the swirl vanes 42, the fuel and air generate a rotational motion before burning and spraying; this enhances the mixing degree of the fuel and air, makes the combustion more complete, improves the combustion efficiency, reduces incomplete combustion products, and reduces the risk of chemical corrosion to the water-cooled wall; the rotating fuel and air can form a stable flame shape, making the heat more evenly distributed in the furnace and reducing the possibility of local overheating of the water-cooled wall; at the same time, four groups of burners 5 are evenly installed on the circumferential side wall at the bottom of the boiler body 5. Since the combustion intensity of the burner directly affects the heat load distribution in the furnace; by reasonably adjusting the combustion angle of the burner, the heat distribution in the furnace can be made more uniform, thereby reducing the risk of local overheating of the water-cooled wall; for burners arranged at the four corners, by adjusting the air-coal ratio and combustion angle of each corner burner, the flame center position can be made appropriate, avoiding the flame being too close to the water-cooled wall and causing too high local heat load; ensuring the hydrodynamic safety of the water-cooled wall on the boiler side and at the same time ensuring the mass flow rate of the water-cooled wall; when the swirl tube 41 is installed inside the fire-spraying pipe 3, first hold the swirl tube 41, and insert the three positioning seats 43 on the outer side of the swirl tube 41 into the three positioning grooves 44 opened on the inner wall of the fire-spraying pipe 3 respectively. At this time, the fixing bolt passes through the through hole 451 opened on the reinforcing seat 45 and is screwed and fixed inside the screw hole 431 opened on the surface of the positioning seat 43, which can quickly position and install the swirl tube 41 inside the fire-spraying pipe 3, and at the same time facilitate the cleaning of the swirl tube 41 and the swirl vanes 42 inside it, or the overall replacement of the damaged swirl tube 41.
[0021] As a preferred embodiment, the axial cross-section of the swirl tube 41 and the fire-spraying pipe 3 is a concentric circle structure, and the swirl tube 41 is a cylindrical structure made of metal.
[0022] The thickness of the swirl tube 41 is less than the thickness of the fire-spraying pipe 3, and the swirl vanes 42 inside the swirl tube 41 are spiral structures made of metal.
[0023] As a preferred embodiment, three positioning seats 43 are evenly installed on the circumferential outer wall of the swirl tube 41, and the distance between adjacent two groups of positioning seats 43 is the same. Three positioning grooves 44 are evenly opened on the circumferential inner wall of the fire-spraying pipe 3, and the distance between adjacent two groups of positioning grooves 44 is the same.
[0024] As a preferred embodiment, the positioning seat 43 and the positioning groove 44 are adapted in size, and the three groups of positioning seats 43 are respectively inserted into the three groups of positioning grooves 44. The cross-sections of the positioning seat 43 and the positioning groove 44 are both dovetail-shaped structures.
[0025] Two groups of screw holes 431 are evenly formed on the surface of the positioning seat 43, and three groups of reinforcing seats 45 are evenly arranged on the circumferential outer wall of the flame spraying pipe 3. At the same time, the three groups of reinforcing seats 45 are respectively arranged opposite to the three groups of positioning grooves 44. The positioning seat 43 is inserted into the positioning groove 44 and fixedly connected by two fixing bolts. The fixing bolts pass through the through holes 451 formed on the reinforcing seat 45 and are screwed and fixed inside the screw holes 431 formed on the surface of the positioning seat 43.
Claims
1. A rich fuel burner for optimizing the water dynamics safety of a boiler based on a water-cooled wall, comprising a rich fuel burner body (1), characterized in that: A positioning disk (2) is fixedly installed at the end of the rich fuel burner body (1), and a flame spraying pipe (3) is fixedly arranged on the surface of the positioning disk (2). Meanwhile, the flame spraying pipe (3) is inserted into the lower side inside the boiler body (5). Four groups of boiler bodies (5) are evenly installed on the circumferential side wall at the bottom of the boiler body (5), and the distance between adjacent two groups of boiler bodies (5) is the same. A swirl structure and its installation components (4) are installed inside the flame spraying pipe (3). The swirl structure and its installation components (4) include a swirl pipe (41) inserted into the flame spraying pipe (3), and swirl vanes (42) are fixedly arranged on the circumferential inner wall of the swirl pipe (41).
2. An optimized rich fuel burner for a boiler based on the hydrodynamic safety of the water wall according to claim 1, characterized in that: The axial sections of the swirl pipe (41) and the flame spraying pipe (3) are concentric circle structures, and the swirl pipe (41) is a cylindrical structure made of metal material.
3. A rich fuel burner for optimizing the hydrodynamic safety of a boiler based on the water wall according to claim 2, characterized in that: The thickness of the swirl pipe (41) is less than that of the flame spraying pipe (3), and the swirl vanes (42) inside the swirl pipe (41) are spiral structures made of metal material.
4. A rich fuel burner for optimizing the hydrodynamic safety of a boiler based on the water wall according to claim 1, characterized in that: Three groups of positioning seats (43) are evenly installed on the circumferential outer wall of the swirl pipe (41), and the distance between adjacent two groups of positioning seats (43) is the same. Three groups of positioning grooves (44) are evenly opened on the circumferential inner wall of the flame spraying pipe (3), and the distance between adjacent two groups of positioning grooves (44) is the same.
5. A rich fuel burner for optimizing the hydrodynamic safety of a boiler based on the water wall according to claim 4, characterized in that: The sizes of the positioning seats (43) and the positioning grooves (44) are adapted to each other, and the three groups of positioning seats (43) are respectively inserted into the three groups of positioning grooves (44). The cross sections of the positioning seats (43) and the positioning grooves (44) are both dovetail-shaped structures.
6. A rich fuel burner for optimizing the water-cooled wall hydrodynamic safety of a boiler according to claim 5, characterized in that: Two groups of screw holes (431) are evenly opened on the surface of the positioning seat (43), and three groups of strengthening seats (45) are evenly arranged on the circumferential outer wall of the flame spraying pipe (3). Meanwhile, the three groups of strengthening seats (45) are respectively arranged opposite to the three groups of positioning grooves (44). The positioning seat (43) is inserted into the positioning groove (44) and fixedly connected through two fixing bolts. The fixing bolts pass through the through holes (451) opened on the strengthening seats (45) and are screwed and fixed inside the screw holes (431) opened on the surface of the positioning seat (43).